Portable electric lamp



A. E. CASE.

PORTABLE ELECTRIC LAMP.

APPLICATION men APR. 30. 1920.

Patented Oct. 3, 1922,

Patented ac s- 22.

UNITED-[STATES PATENT OFF-ICE.

ARTHUR E. CASE, OF MARION, INDIANA, ASSIGNOR TO DELTA ELECTRIC COMPANY, OF MARION, INDIANA, A CORPORATION OF INDIANA PORTABLE ELECTRIC LAMB.

Application filed April 30, 1920. Serial No. 377,748.

is applicable either to a case made 'of conducting or non-conducting material; improved means located in a removable cap at the end for containing one of the members of the switch; improved means for yieldingly. locking the movable switch-member in closed or open position; improved means for securing a switch member in the removable cap; and a portable electric lamp which is simple in construction and efficient in operation.

features hereinafter'set forth and more particularly defined .by' claims at the conclusion hereof. v v

In the drawings: Fig. l'is a side elevation of a lamp embodying the invention. Fig. 2 is a longitudinal section, the battery and incandescent lamp being shown inelevation.

. Fig. 3 is a longitudinal section upon an enlarged scale throu h the cap and lower portion of the case. ig. 4 is a plan of the cap.

85 Fig. 5 ,is a detail of the ring which is fixedin the lower end of the case to guide the end of the movable switch-member. Fig. 6

is a detail section on line .66 of Fig, 4."

Fig. 7 is ade'tail section on line 7-7 of Fig. 1. Fig. 8 is a detail of the incandescent lam socket. T elamp comprises a cylindrical case ,8 which may be either of insulatingbrconducting material and is adapted to contain a battery 9 of usual construction, one end of the batteries being provided with a terminal .10 which is adapted to en age the tip-contact 11 of an incandescent amp 12 which is provided with the usual screw-threaded base 13. f A screw-threaded ring 14 is secured to the upper end of the body 8 by rivets 15. A-hood 16 is screw-threadedtoengage the 1 ring 14 and thereby removably connected to the body. This hood is ada ted to contain a sheet-metal reflector ,17. The upper end spect to the reflector. -1s secured and electrically connected .to the The invention consists in the several novel bear against the electrode at the lower end of the battery 9 to serve as a conductor beof the hood 16 is screw-threaded, as at 18, to a ring 19 which is adapted to removably secure the lens or glass plate 20 and the reflector 17 in connected relation to the hood 16 the margins of the lens and the reflector being clamped between the upper end of the hood and an inwardly extending-flange 21 or rin 19. A lamp-socket 22 is riveted to the re ector andthe base 13 of the lamp 12 I is held in said socket. This lamp socket is spllt, as at 22, to render it resilient so it will frictionally hold the lamp-base in desired position. This is important, because it becomes posslble to focus the lamp with re- A conductor strip 23 14. he lower end of the case 8 is adapted to be closed by a cap 25 which is provided with a screw-thread 26 to engage a correspondrin mg thread 27 on a ring 28 which is secured to the lower end of case 8 by rivets 29. This cap is removable so that the battery may be inserted into and withdrawn from the body. disk 30 of insulating material is secured 1n the lower end of the cap 25 by a central hollow rivet 31. The margin 32 of the disk 30 engages the inner face of the end of the cap 25 and its central portion'33 is offset relatively to the margin so that it will be spaced from the end of the cap. A contact-plate 34 is secured against the up per-'face of the insulating disk30 by struc up tongues 35 which pass through'slots-36 in, and are clinched under, the insulating disk to secure said disk and plate rigidly together. A coil-spring 37 is secured to the disk 34, the coil at one end being extended through eyes 38 struck up from the disk. The upper end of the spring is adapted to tween the battery and plate 34, as well as in insulating disk 30. Plate 34 is provided with a rim or flange 39 with which the mov- 4 i able switch'member is adapted to engage.

A finger-piece 40 is slidable on the outside of the case. An escutcheon plate-41 is secured to the body by rivets 42. A slot 43 is formed in the body of the case and the escutcheon plate. A movable switch strip 44 has an offset portion 46 which is disposed in the slot 43 and is secured by rivets 45 to the finger-piece 40. A plate 40 is interposed between strip 44 and piece 40. This switch strip 44 is extended downwardly to the lower end of the case to engage the flange 39 of the'plate 34. The lower end of this switch strip is guided into and out of engagement with said plate by a ferrule 50 which is secured in ring 28 and is fixed in the lower end of the case 8 and provided with an in-struck loop 51, the switch-strip passing between the loop and the wall of the ferrule. The lower end of the strip is provided with an ofi'set terminal 52 and an offset portion 53 which are spaced apart a sufiicient distance to receive the loop 51 when the switch is open, as shown in Fig. 2. The switch-strip is resilient and when the circuit is to be closed it is forced downwardly to bring the offset 53 below the loop 51 so that the switch-strip will be yieldingly locked in closed position. I When the switch is open, it will also be yieldingly locked by offset portions 52 and 53 above and below the loop 51.

circuit will be kept either open or closed without likelihood of accidental shift.

When the switch strip 44 is lowered, a circuit for the operation of the lamp will be established as follows: electrode 10, tipcontact 11, the filament of lamp" 12, lampbase 13, socket 22, reflector 17, hood 16, ring 14, rivet 24, strip 23, rivet 42, escutchcon plate 41, finger-piece 40, switchrip- 44, plate 34, spring 37 and the electrode at the lower end of the battery 9. When the switchstrip 44 is se arated from the plate 34, the circuit will e interrupted between said parts. Whenthe switch-Strip is in position to open the circuit, its lowerend will lie close to the wall of the case, so that the removal and insertion of the battery will not be interfered with.

The invention exemplifies a portable elec tric lamp which is sim le in construction, can be produced at a ow cost, which is adapted either for a case of insulating or conductin material and in which the switch is efficient y held in desired position.

The invention is not to beunderstood as restricted to the details set forth, since these may be modified within the scope of the appended claims,-without departing from the spirit and scope of theinvcntion.

claim:

i. In a portable lamp, the combinof a case, battery in the case, swi I reflector, an electric lamp, and a socket naving one of ends continuous and fixedly and directly secured to the reflector and This construction exemplifies a switch which is simple and whereby the through which the lamp-base is adapted to enter the socket, provided with a screwthread for the lamp-base and having its other end split to hold the lamp in assigned focal relation to the reflector by the inherent resiliency of the split end, the end of the socket secured in the reflector being inelastic.

2. In a portable lamp, the combination of a case, a battery in the case, a switch, a reflector, an electric lamp, and a socket having a groove in its outer periphery in which the inner margin of the reflector is fixedly secured, provided with a screw-thread for the lamp-base, and having its other end split to I hold the lamp in assigned focal relation to the reflector by its inherent resiliency, the grooved end of the socket being inelastic and the lamp-base being adapted to enter the socket through the inelastic end.

3. In a portable lamp, the combination of a battery, a case containing the battery,'a lamp held in one end of the case and in engagement with one terminal of the battery, a removable ca for the other end of the case, a contact-p ate secured in the cap andinsulated therefrom, a switch strip slidably'mounted in the case, and a ring in the case provided with a struck-up loop in which the strip is guided. I

4; In a portable lamp, the combination of a battery, a case containing the battery, a

lamp held in one end of the case and in terminal of the bat engagement with one tery, a removable cap for the other end of the case, a contact-p ate secured to the cap and insulated therefrom, ably mounted in the case, and a loop in one end of the case adjacent the cap in which said strip is guided, said strip being provided with an offset portion adapted to pass through said loop.

5. In a portable lamp, the combination of a battery, a case containing the battery, a lamp held in one end of the case and in engagement with one terminal of the battery, a removable cap for the other end of the case, a contact? late secured in the cap and insulated there rom, a switch-strip slidably mounted in the case, and means in one end of the case adjacent the cap to guide said strip, said strip being provided with offset portions adapted to enga 'e the guide means and for holding it in different positions.

6. In a portable lamp, the combination of a battery a case containing the battery, a lamp he d in one end of the case and in engagement with one terminal of the battery, a removable cap for the other end of the case, a contact late secured in the cap and insulated there row, a switch-strip slidably mounted in the case, and a loop in one end a of the case adjacent the cap, in which said stri is guide said stri being provided wit offset portions one 0 which 18 adapted to pass through said loop.

a switch-strip slid-' 7 In a portablelamp, the combination of a battery, a case containing the battery, a lamp held in one end of the case and in engagement with one terminal of the battery, a

removable cap for the other end of the case, a contact-plate in the cap, 'an insulating disk between the plate and the cap having its central portion spaced away from the cap, a rivet extending through the cap and said insulating disk, means for securing the plate and insulating disk together and extending into the space between the disk and the cap, and a movable switch-strip in the case adapted to engage said plate.

8. In a portable lamp, the combination of a. battery, a case containing the battery, 9.

ofi'set portion of the lamp held in one end of the case and in engagement with one terminal of the battery,

' ing through the cap and said insulating disk,

means for securing the plate and the central portion of the insulating disk together, the

contact plate having a portion lapping the disk and a movable switch-strip in the case and adapted to engage said plate.

ARTHUR E. CASE. 

